Re: [boost] [Polygon] Template error in CodeWarrior when attempting union on polygon_set_data

Subject: Re: [boost] [Polygon] Template error in CodeWarrior when attempting union on polygon_set_data
From: Simonson, Lucanus J (lucanus.j.simonson_at_[hidden])
Date: 2010-01-21 12:17:41

Kef Schecter wrote:
> I hesitate to mark this as [Polygon] because the error message is in a
> different part of Boost. However, I have little idea what the actual
> cause of the problem is or what any of the relevant stuff even means,
> so 
> I figure [Polygon] is as good as anything at the moment...
> 
> As before, this is a custom version of CodeWarrior an embedded ARM
> system, so I have no idea how well it corresponds with other versions
> of CodeWarrior.

Please try polygon in standalone mode and define the BOOST_POLYGON_NO_DEPS macro.  In order to use mpl and and or for SFINAE I had to pull in quite a lot of the mpl.  My own implementation of these is enabled by the macro and if you see a compiler error with them I'll quickly be able to understand the problem.  If you don't see a compiler error with the macro then I can come up with a new macro to exclude mpl dependency but still use enable_if and config.hpp.
 
> Here is a trivial program that illustrates the problem, using the
> BOOST_VERY_LITTLE_SFINAE patch from the last discussion here:
> 
> #include <iostream>
> #define BOOST_VERY_LITTLE_SFINAE
#define BOOST_POLYGON_NO_DEPS
> #include <boost/polygon/polygon.hpp>
> 
> using namespace boost::polygon;
> using namespace boost::polygon::operators;
> 
> int main()
> {
>      polygon_set_data<int> ps;
>      ps += rectangle_data<int>(0, 0, 1, 1);
>      return 0;
> }
> 
> 
> This results in the following error message :
> 
> Error   : illegal use of template argument dependent type 'T::type'
> 
> 
> The error occurs in this part of
> boost/mpl/aux_/preprocessed/plain/and.hpp: 
> 
> template< typename T1, typename T2, typename T3, typename T4 >
> struct and_impl< true,T1,T2,T3,T4 >
>      : and_impl<
>            BOOST_MPL_AUX_NESTED_TYPE_WKND(T1)::value
>          , T2, T3, T4
>          , true_
>          >
> {
> };
> 
> 
> Any ideas about what's wrong or how to fix it?
> 
> - Kef
> 
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